Toy-aeroplane-motor winder



C. H. GRANT AND C. B. WERTZ.

TOY AEROPLANE MOTOR WINDER APPLICATION FILED SEPT. 29, 1919.

Patented Mar. 8, 1921.

Fig. 2

WITNESSES: M rfi' Hymn/ UNITED STATES PATENT OFFICE.

CHARLES H. GRAN T AN D CHARLES B. WERTZ, OF DAYTON, OHIO.

TOY-AEROPLANE-MOTOR WINIDER.

Specification of Letters Patent.

Patented Mar. 8, 1921.

Application filed September 29, 1919. Serial No. 327,013.

To aZZ whom it may concern:

Be it known that we, CHARLES 'H. GRANT and CHARLES B. WVERTZ, citizensof the United States, residing in the city of Dayton, county ofMontgomery,- and State of Ohio, have invented certain new and usefulImprovements in Toy Aeroplane Motor Winders, of which the following is aspecification.

The principal object of our invention is to provide a simple andeflicient winder for the motors of toy-aeroplanes. These motors usuallyconsist of singleor double strands of rubber which must be'wound tighttogive the best results. Only with a winder of our design can the properand equal tension in double motors, such as we employ, be obtained.Accordingly, the veriest amateur,

by the use of our winder, can quickly wind both propellers at the sametime, with no danger of the winder failing to operate after the strandshave been placed under a certain tension, as in the case of manyimprovised winders.

The preferred form of embodiment of our invention is illustrated in theaccompanying drawings, of which Figure 1 is a perspective view of ourmotor winder, and F ig. 2 is a side elevational view thereof, partly insection.

Throughout the specification and drawings, simllar reference charactersdenote corresponding parts.

In a detailed description of the preferred form of embodiment of ourinvention, the numeral 1 designates a piece of sheet metal whose lowerend is bent in the form of a loop riveted at its upper portion, toprovide a handle 2. Above its handle portion, the metal piece 1 is bentoutwardly and then upwardly to provide a vertical portion which tightlyreceives in a hole therein, a bolt 3 whose head has a preferably reducedinner portion a which forms a spindle fora disk 5, the inner end of thebolt receiving a nut 6.

A short distance above the bolt 3, the metal piece 1 terminates in ahorizontal U shaped portion 7 whose free end projects over the top ofthe disk 5, with a down wardly curved flanged portion 8 for a purpose tobe hereinafter described.

In the top portion of the U shaped portion 7 of the metal piece 1 areprovided two holes spaced a short distance apart to receive two shortwinding arbors 9, 9 whose lower ends are tapered for support in taperingholes provided in the lower arm portion of the U shaped portion 7 of thepiece 1. At its upper end each arbor 9 terminates in a hook 10 adaptedto receive the strands of rubber comprising one of the toy-aeroplanemotors.

The arbors 9, 9 are turned by the following means, quickly to place therubber strands comprising both motors, under equal and suflicienttension to propel the plane. Riveted to that portion of each arbor 9which is between the horizontal arms of the U shaped portion 7 of themetal piece 1, is the neck portion 11 of a gear 12. The gears 12 are inmesh, so that when one is turned, the other will be rotated by it.

The teeth of the gear 12 nearest the disk 5, enter apertures 13' whichpreferably have the form of radial slots provided around the disk 5 nearits marginal edge; The flange 8 on the outer end of the metal piece 1,serves to limit the outward movement of the disk 5 beyond a point wherethe apertures in the disk would passthe teeth in the gear withoutengaging them. Therefore, the disk and gear nearest it, will always bein engagement no matter how strong the tension may be come in the rubberstrands. In many improvised motor winders, when the tension of thestrands reaches a certain point, which is short of that required toefiiciently operate the plane,.the gears of the winder will slip out ofmesh, rendering the winder inefiicient for proper service. In ourwinder, the gear and disk will always remain in engagementduring thewinding operation.

Riveted to the face of the disk 5, between the circumferential row ofapertures 13 and the bolt 3, is a crank 14 by means of which the diskmay be turned with no great effort to make the turning ratio between thearbors and disk a little over four to one. Accordingly, the rubberstrands may be wound quickly by the arbors 9, 9, and since they turn inthe same ratio, an equal tension will be placed upon the double motorsto make the flight of the aeroplane a perfect one.

If desired, the device may be equipped with just one arbor, for windinga single motor, without departing from the spirit of the invention.Other changes and modifications may be made in the device within thescope of the subjoined claims.

Having described our invention, we claim:

1. In a device of the type described, the combination with a handlepiece, of an apertured disk pivotally secured to the upper portion ofsaid handle piece, a crank for turning said disk, a bearingportionformed on the top of said handle piece, a windlng arbor supported insaid bearing portion, a

gear on said arbor adapted to be turned by the apertured disk, and a'flange terminal on the upper portion of said handle piece for preventingsaid gear from slipping out of mesh with said disk, for the purposespecified. v

2. In a device of the ty e described, the

combination with a hand e piece, of an apertured disk pivotally securedto the upper portion of said handle piece, a crank for turning saiddisk, a horizontal U shaped bearing support on the upper end of said ahandle piece, a winding arbor vertically dis- .an outwardly and'upwardlyextending portion of said piece of metal above the handle part, anapertured disk pivotally secured to the upwardly extending portion ofsaid metal piece, a horizontal U-shaped bearing portion integral withthe upwardly extending part of said metal piece and provided with holes,a pair of arbors projecting downwardly through the holes in the top armof said U-shaped portion, into the holes in the bottom arm of 7 saidU-shaped 7 member, a hook on-the upper end of each arbor, its bottom endbeing tapered to rest in one of the last mentioned holes, a gear :Easton each arbor within the U-shaped inclosure, said gears meshing witheach other, while the outer one is engaged by the apertured disk, acrank for turning said disk, and a flange on the outer end of saidU-shaped portion, engaging the outer face of said disk to hold it inengagement with the gear nearest it, for the purpose specified.

In witness whereof we have hereunto set our hands this 26th day ofSeptember, 1919.

CHARLES H. GRANT. CHARLES B. WERTZ.

Witness: HOWARD S. SMITH.

